On this parts fiche the Dust Seal,17x24x5 is the most specified component.
Parts such as the Rear Cushion (cbr600fm/2m/n/2n/2p): Cushion Assy.,rr., Grommet (showa), Adjuster,spg, Seal,dust are included in the Cbr600f Hurricane 1991 (m) Germany / Kph Rear Cushion (cbr600fm/2m/n/2n/2p) parts fiche.
The Honda REAR CUSHION (CBR600FM/2M/N/2N/2P) has twenty-four products enlisted in the schematic.